Excavator.



No. 825,549. PATENTED JULY 10, 1906. W. B. MAGEB.

BXGAVATOR.

urmoumx mum (38120, 1905.

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PATENTED JULY 10, 1906;

W. E. MAGIB. BXGAVJQTOE. APPLICIATIOH EILED 001220. 1905.

2 SEEE'IS-filigii? 3.

WILLIAM EDSTON MAGIE, or some,

MILWAUKEE, WISCONSIN, AS SIGNOR TO THE BUUYRUS COMPANY, OF SOUTH MILWAUKEE, VVESUONSIN, A

CORPORATION, OF WISCONSIN;

EXOAVAT'OR.

Specification of Letters Patent.

Applicatiin iiled 0mm 20. was. Seria11lor283,642.

To all whom it may concern:

Be it known that I, WILLIAM ELs'roN MA- GIE, a citizen of the United States, residing at South Milwaukee, county of Milwaukee, State of Vvisconsin, have invented certain new and useful Improvements in Excava-.

tors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertainsto make and use the same.

The invention relates to improvements inv steam-shovels and like excavators, and has for its object to rovide a simple and efficient form of sad le-block to be employed in connection with a two-piece dipper-handle which straddles the boonyto provide a novel arrangement of thrusting-gear, and to provide a novel arrangement of boom-guys.

In the accompany'in drawings, Figure '1 is a side elevation of the forward end of a steam-shovel embodying the various features of this invention. F 1g. 2 is a plan view thereof, certain parts of the mechanism being omitted for the sake of clearness. Fig. 3 is upon the ear-body ing-hottom .c. and of the dipper-handle (Z, which consists of a plan View of the dipper-handle and saddle block. Fig. 4 is a side elevation thereof. Fig. 5 is an end view, artly in section, of the dip er-handleand sa dle-blocki Iihferringto the drawings, 1 indicates the oar-body u on which the steam-shovel is mounted. it will be understood, of course, that any other suitable support may be provided in lieu of the car-body in accordance with the exigencies of engineering practice.

5 represents the boom, whichis mounted upon the usual swinging table so, pivoted or other support to permit the boom and appurtenant parts carried thereb to he swung to the right and left of the axial lineof the machine by means of a power-driven gear y, meshing with teeth on the edge of the circular swinging table. The boom 6 carries a dipper c, which 'isof the usual form provided with the pivoted dump, Dipper c is secured to the.

two parallel )eams e e, which are connected at one end by a spacer block or tiefand at the other end by a casting 9, said casting 9 being provided with cars or lugs it on its are run in and out in the t aforesaid.

"steam-shovels) rotate wit lower forward edge, in which the dipper is hung, and on its upper face with legs i, to which the dipper brace rods are connected. Each of the beams e is provided on its lower ed c with a rack e, which racks engage suitab e thrusting-pinions s s, mounted upon a shipper-Shel t 1, which in turn is mounted in suitable su" porting brackets or plates 1:, attached to the boom sides.

In order to properly guide the two membersof the dipper-handle e e and to hold the same close to the sides of the boom as they' digging operation, there is provided a s ecial form of saddlebiock,whioh consists o a base piece k and two npwardl5,-*extending generally triangular shaped lateral arms Z, provided with inwardl -'-projecting flanges m. To the base-' piece is secured a sleeve 72., which embraces the shippenshaft r, hereinhefore referred to. The horizontal flanges m are preferably Patented July 10, 1806. V

rovid ed with removable liners 0, against which the upper ed e of the beams e c, formin the paral inem ers of the dipper-handle, ear,

'and the lateral arms I are also preferably which are provided with removable liners enqaged by the sides of the mem ers e s.

wil be noted that this construction insures I the two members of the dipper-handle being held in accurate parallelism with each other and in close proximity to the sides of the hoom,and also secures an accurate meshing engagement between the racks e on the lower sides of the members e c with the resolving thrusting-pinions s s for all positions of the dipper-handle, and that the saddleblock may he swung down opposite the sides of the boom without in any way interfering therewith or with the operation of the thrustingcaring or the hoisting cable.

T 1e shipper-shaft r may either be fixed in its two supporting-plates b, mounted on oposite sides of the boom, that the saddlelilock will oscillate freely thereon, 'or said ship er-shaft may be fixed to the saddle bloc and rotate in its hearings in the plates In either case thoshipper-shaft construction of the thrustingpinions in order to run the dipper-handle n and out, as each thrusting-pinions is made 111 does not (as in the ordinarfy I one piece with or bolted firmly to the corretorsional strains than would be possible were spending gear t, the two sets of gears thus connected rotating upon the shipper-shaft and the respective gears it being on the out side overhanging and entirely clear of the members of the dipper-handle, while the pinions 8 s extend underneath the saddle-block to engage the racks e e on the lower sides of the members of the dipper-handle. ,This arrangement of the gears t and pinions s constitutes a valuable improvement, as it entirely dispenses with the necessity of securing the shi per-shaft pinions to the shaft by means of eys or other devices, which occasion much trouble by working loose, 'wcaring unduly, or breaking olf. Both the shipper-shaft gears and the thrusting-pinions ii are driven at the same rate of speed and in fixed relation with each other by means of gears u, keyed to the ends of the crank-shaft 'i) of the engine in, mounted upon the boom.

It will be apparent, of course, that instead of the engine in any other suitable type of motor may be employed, provided, of course, the latter is appropriately connected to drive two gears which mesh with the respective gears t t in order to run the latter and the thrusting-pinions secured thereto at the same rate of speed.

The dipper c is provided with the usual form of bail c, to which is connected a block a, under which the hoisting-rope d rims. Said hoisting-rope d is connected at one end to the boom, and after running under the block it passes over a guideshcavc d on. the

end of the boom, thence along the boom and under a suitable fairlead j" to the hoistingdrum mounted on the carbody.

In order to support the boom, there is provided the usual form of A-frai'nc consisting of the two legs it, which are connected to the A- frame head 0, upon which is swiveled the usual type of yoke n. Connected to opposite sides of the yoke n are two parallel guy-rods, which instead of passing above the thrasting-gearing and finding their attachment at the end of the boom are connected to an extension Ii of the side plates /1 on the boom. This brings the boom attachment of the guys below the thrusting-pinions, and therefore below the sweep of the dipper-handle. ble to locate the boom-guys horizontally,

which avoids the usua' vertical component of the two ends not attached to each other.

What I claim is 1. In an excavator, the combination of a swinging boom, a handled dipper operatively supported thereby, and u s attached to said boom below the sweep 0% the dipper-handle.

2, In an excavator, the combination of a swinging boom, a handled dipper operatively supported thereby, and guys attached to said boom by the shipper-shaft brackets.

3. In an excavator, theicombination of a swinging boom, a dipper-handle comprising two parallel members straddling the boom and provided with a cross-tie at the up or end, and guys attached to said boom be ow the sweep of said dipper-handle.

4. In an excavator, the combination of a swinging boom, a dipper-handle comprising two parallel members straddling the boom, and a saddle-block comprising a slcive mounted on the shipper-shaft and two lateral arms in. which the parallel members of the dipperhandle are guided.

In an excavator, the combination of a swinging boom, a dipper-handle coniprising two parallel members straddling the boom, and a saddle-block comprising a base having a sleeve projecting therefrom to engage the shipper-shaft, and two lateral arms having horizontal flanges on their upper sides to guide the parallel members of the dipper-handlc.

6. In an excavator having a swinging boom, a saddle-block comprising a sleeve engaging the shipper-shaft, and lateral arms lprojecting therefrom and having flanges on t i:ir upper sides to engage and guide the dipper-handle.

7. In an excavator, the combination of a swinging boom, a dipper-handle formed of i two parallel members straddling the boom, a

This arrangement also makes it possithe stresses imposed upon the A-lrame hi-iid, Y

and iermi'ts of the use of the cross-tic], joining i l) upper ends of the dipper-handle members e e, as will be apparent from an inspection of Figs. 1 and 2. This latter feature is of much im ortance, as the two sides of the dippcr-hanilie are held rigidly in accurate parallelism and in proper position to engage the thrusting-pinions, and it also enables the dipper-handle to withstand much greater shippcr-shaft mounted on. the boom, and

pairs of connected thrusting-gears and thrusting-pinions loosely mounted upon the shipper-shaft, said pinions engag ng the respirtivc parallel members of the dipper-hand e.

H. 'lhrusting-gcaring for sti-iiiiishovels and the like, comprising a shipper-shaft, two thrusting-gears loosely mounted upon the respective ends of said shaft, and thrustingpinions attached to said gears.

9: In an ex avator, the combination ol a swinging boom, a shipper-shah. extending through supports on said boom. tliriistingpiniohs on said shaft, a dividi-d dipper-handle straddling the boom, and a sin lc-block embracing said shipper-shaft between its supports and extendii'ig outside of and above t 10 separate members of the dipper-handle to hold the racks upon the dipper-handle members in mesh with the thrustinginions.

10. In an excavator, the com )ination of a swinging boom, a shipper-shaft extending through supports mounted upon the boom,

thrusting-gram with thrusting-pinimm rigidly uthu'hod thereto and mounted u )on each end of lhv shipper-film, &- divierl handic sinuldlng tho boom, and a sadtfiw him-k vmbmving said shipper-shaft between its supports and extending outside of and above tho separate members of the dipperhnml It to huid the racks upon the dipper-haniiipperia members in mash with the thrusting-pi inns.

In testimony wltermf' I 2153:: my signature in pl'csvncc of, two witnesses.

W ILL! AM ELSPON M AGI E. \Vi mosses RUJGELY FLETCHER, HARRY B. ll AYl)l11N. 

